c# - Bind Bool to Visibility of TextBlock within a ListBox -

i want bind visibility of textblock, within listbox, bool value in viewmodel. binding works textblock outside listbox, isn't working textblock within listbox. please help!

xaml code:

<textblock x:name="heading" visibility="{binding myvb.visible, converter={staticresource booltovisconverter}}" width="480"/> <listbox x:name="lstbani1" itemssource="{binding users}">             <listbox.itemtemplate>                 <datatemplate>                     <stackpanel orientation="vertical">                         <textblock x:name="tb1" text="{binding string1}" visibility="{binding myvb.visible, converter={staticresource booltovisconverter}}" width="480"/>                         <textblock x:name="tb2" text="{binding string2}"  width="480"/>                         <textblock x:name="tb3" text="{binding string3}" width="480"/>                     </stackpanel>                 </datatemplate>             </listbox.itemtemplate>         </listbox> 

cs code:

public partial class page1 : phoneapplicationpage {     public page1()     {         viewmodel model = new viewmodel();         model.users = getusers();         model.myvb = new myvisibility();         model.myvb.visible = false;         this.datacontext = model;     }     // view model     public class viewmodel     {         public list<user> users { get; set; }         public myvisibility myvb { get; set; }     }       // bool visibility converter      public class booleantovisibilityconverter : ivalueconverter     {         public object convert(object value, type targettype, object parameter, cultureinfo culture)         {             return (bool)value ? visibility.visible : visibility.collapsed;         }          public object convertback(object value, type targettype, object parameter, cultureinfo culture)         {             throw new notimplementedexception();         }     }     // property classes     public class user     {         public string string1 { get; set; }         public string string2 { get; set; }         public string string3 { get; set; }     }     public class myvisibility : inotifypropertychanged     {         private bool _visible;         public event propertychangedeventhandler propertychanged;         public bool visible         {             { return _visible; }             set             {                 _visible = value;                 notifypropertychanged("visible");             }         }         public void notifypropertychanged(string propertyname)         {             if (propertychanged != null)             {                 propertychanged(this, new propertychangedeventargs(propertyname));             }         }     }     private list<bani> getusers() {....}                     } 

your listbox bound users, therefore each item in list has datacontext bound user. therefore binding trying property in user class, not parent data context.

give page name , change binding following:

visibility="{binding datacontext.myvb.visible, elementname=yourpagename, converter={staticresource booltovisconverter}}"